Abstract
1. The fatigue failures in the rotors of turbine generators can be classified from the dynamics of the fatigue process into slow ones characteristic of nominal working conditions and sudden ones occurring during normal or emergency overload when there are cracks of critical length. 2. The most hazardous points for fatigue failure in the sections of shafts containing segment grooves are the points of emergence of the grooves on the cylindrical surface. 3. It has been shown that SPD methods give good strengthening of rotor steel. which is due to the high residual compressive stresses in the surface layer. 4. Surface plastic deformation methods give high performance in increasing the fatigue strength of shafts with segment grooves.
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